Cách sử dụng
Toothbrush is a tool we use to clean our teeth. It has a handle and a bunch of bristles on one end. We put toothpaste on the bristles and use it to scrub our teeth so they are clean and healthy. We use it twice a day, once in the morning and once before bed, for at least two minutes each time. It's important to change your toothbrush every few months to keep it clean and effective.